Not sure how to explain this, but I have noticed some very odd behavior from my Yellow Tang over the past week. He has been in the tank (130gal) for about 3 months, he is always cruising around patrolling and doing normal tang things, picking at nori, rocks, etc. Recently he has been hiding behind a rock in the back, picks at the rocks occasionally, hides, occasionally comes out, and is eating very little (usually an aggressive eater during feedings). I have been inspecting him daily and see no signs of disease, discoloration, heavy breathing, fin rot/damage, etc.
The only changes I have made to the tank is shortening the light cycle from 12 hrs to 7 and adding 20ML of Microbacter7 (5ml/20gal) daily to help combat cyano. All other water parameters look great and all other fish are active and eating normally. Could any of these things cause fish stress?
The only changes I have made to the tank is shortening the light cycle from 12 hrs to 7 and adding 20ML of Microbacter7 (5ml/20gal) daily to help combat cyano. All other water parameters look great and all other fish are active and eating normally. Could any of these things cause fish stress?